Apple makes a Magic Keyboard with a French Canadian layout available in Canada. Why not sell it in the US? The French layout is terrible. The French Ministry of Culture is even commissioning it's replacement.

This is a blue-tooth keyboard so there should be no reason for it not to work with the iPad Pro. The experience should be flawless. I use this keyboard with my Mac and its seamless. and the iPad Pros have blue-tooth 4 or 4.1 depending on what model. Go ahead and purchase it! :)